2nd floor joist

I am building an office addition in a warehouse with a loft above the office. I installed 2x6x12 joist. When I walked on them to test the strength, they were bouncy. What can I do to make it more sturdy?

2nd floor joist

If tearing it all out is not your game, maybe you can add height to the existing joists by putting a 2x4 under them (vertically, of course) and glue and screw plywood to both members. Use the longest plywood you can get (9'?) and put the extra boards/plywood on the center of the 12' span. Either that, or put plywood and 2x4s full length on both sides, staggering joints on opposites sides.

2nd floor joist

Quote:

Originally Posted by rocke

I am building an office addition in a warehouse with a loft above the office. I installed 2x6x12 joist. When I walked on them to test the strength, they were bouncy. What can I do to make it more sturdy?

Ask the architect who drew the plans what to do. It's an office, you do have approved plans, right?